AVideo: IDOR in uploadPoster.php Allows Any Authenticated User to Overwrite Scheduled Live Stream Posters and Trigger False Socket Notifications

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.4 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

• CVE-2026-34247: 0.25% estimated exploitation activity in the next 30 days; percentile 16.12 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The plugin/Live/uploadPoster.php endpoint allows any authenticated user to overwrite the poster image for any scheduled live stream by supplying an arbitrary livescheduleid. The endpoint only checks User::isLogged() but never verifies that the authenticated user owns the targeted schedule. After overwriting the poster, the endpoint broadcasts a socketLiveOFFCallback notification containing the victim's broadcast key and user ID to all connected WebSocket clients. Details The vulnerable endpoint at plugin/Live/uploadPoster.php accepts a livescheduleid from $REQUEST and uses it to determine poster file paths and trigger socket notifications without ownership validation. Entry point — attacker-controlled input (line 11-12): Insufficient auth check (line 14-17): This only verifies the user is logged in. There is no check that User::getId() matches the schedule owner's usersid. Poster path resolved by ID alone (line 40-42): getPosterPaths() is a static method that constructs file…

Published by the source

29 Mar 2026, 15:41 UTC

Last modified by the source

29 Mar 2026, 15:41 UTC

Source last checked

26 Oct 2026, 14:39 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-g3hj-mf85-679g

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# Patch Next advisory brief: CVE-2026-34247

Advisory: AVideo: IDOR in uploadPoster.php Allows Any Authenticated User to Overwrite Scheduled Live Stream Posters and Trigger False Socket Notifications
IDs: CVE-2026-34247, GHSA-g3hj-mf85-679g
Record: https://patchnext.com/advisories/cve-2026-34247 (revision 1, source checked 26 Oct 2026, 14:39 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist wwbn/avideo: affected <= 26.0

## Suggested inspection (read-only)
- Packagist wwbn/avideo: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on wwbn/avideo.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-g3hj-mf85-679g (GitHub-reviewed advisory GHSA-g3hj-mf85-679g lists affected ranges: Packagist wwbn/avideo >=0 <=26.0)

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